Door security lock

ABSTRACT

A security lock for attachment to an outwardly opening hinged door to prevent opening of the door from the hinged side by removing the hinge pins. The lock comprises two separate interlocking members, one being an elongated tubular member which is inserted in a hole drilled in the door jamb, and the other being a fixed projecting pin mounted on an angled support plate attached to the door adjacent the hinged side thereof, in a position in which the outer end of the pin is received within the tubular member when the door is in its closed position, and removed therefrom when the door is opened.

United States Patent 11 1 Hudgins DOOR SECURITY LOCK [76] Inventor:Earnest C. Hudgins, 1050 NW.

First Ave., Boca Raton, Fla. 33432 22 Filed: July 16, 1973 21 Appl. No.:379,420

[52] US. Cl. 16/128 [51] Int. Cl E05d 9/00 [58] Field of Search 16/137,135

[56] References Cited UNITED STATES PATENTS 167,576 9/1875 Skidmore16/137 1,111,135 2/1914 Carlson ..16/137 1,442,731 l/l923 Ohnstrand16/135 1,770,612 7/1930 Gullicksen 16/191 2,664,601 1/1954 Meinol 16/1371 Feb. 18,1975

Primary ExaminerPaul R. Gilliam Assistant ExaminerDoris L. TroutmanAttorney, Agent, or Firm-Harry N. Schofer [57] ABSTRACT A security lockfor attachment to an outwardly opening hinged door to prevent opening ofthe door from the hinged side by removing the hinge pins. The lockcomprises two separate interlocking members, one being an elongatedtubular member which is inserted in a hole drilled in the door jamb, andthe other being a fixed projecting pin mounted on an angled supportplate attached to the door adjacent the hinged side thereof, in aposition in which the outer end of the pin is received within thetubular member when the door is in its closed position, and removedtherefrom when the door is opened.

4-Claims, 9 Drawing Figures 1 DOOR SECURITY LOCK BACKGROUND OF THEINVENTION 1. Field of the Invention This invention relates to a doorsecurity lock, and more particularly to a security lock for attachmentto an outwardly opening hinged door to prevent opening of the door fromthe outside merely by removing the hinge pins.

In some areas of the-country, especially in those areas subject tohurricanes, it is a common practice to mount the hinges on outside doorsto open outwardly,-to prevent the hurricane winds from blowing the doorinwardly. Such a door mounting places the hinge pins on the outside, ina position in which the pins can readily be removed, and the door can beeasily swung open at the hinged end in spite of the usual lockingdevices at the other end of the door.

2. Description of the Prior Art The prior art, in the most part, seeksto solve this problem by providing interlocking means between the twoplates of the hinge, Attempts have also been made to apply interlockingmembers on the door and on the door jamb, but as a rule they arecumbersome and complex.

SUMMARY OF THE INVENTION It is an object of this invention to provide anovel security lock for a hinged door that can be applied to existinginstallations and does not call for the removal and replacement of theexisting conventional hinges.

It is a further object of this invention to provide a novel securitylock for a hinged door that is simple in construction, economical tomanufacture, efficient in operation, and which'can readily be installedby unskilled workers.

The attainment of the above objects, as well as additional objects andadvantages, is accomplished by a pair of separate interlocking members,one member being attached to the door adjacent the hinged end andincluding a projecting pin, and the other member including an elongatedtubular sleeve adapted to be received within a hole formed in the doorjamb, the two parts being so mounted that the projecting end of the pinis received within the tubular sleeve when the door is in itsclosedposition, and removed therefrom when the door is opened.

Four preferred forms of the invention are disclosed in thisspecification. In the first form, a fixed projecting pin is mounted onthe end of one section of an angled support plate, another section ofthe support plate having attachment receiving means in the form ofopenings to receive screws to attach the plate to a door. In all formsof the invention, an elongated tubular sleeve is received within a holeformed in the door jamb to receive the projecting end of the pin whenthe door is in its closed position.

In a second form of the invention, the angled support plate has three 90angles forming four sections. The projecting pin is mounted on the faceof one of said sections, said one section joining a second sectionextending at an angle of 90 from the face thereof serving as a supportbase, and joining a third section also extending at 90 from the facethereof, adapted to contact the door, functioning as a reinforcingmeans. The second section joins with a fourth section, extending at anangle of 90 from the face of the second section and parallel with thefirst section, the second and fourth sections adapted to engage theinside face and the edge of the door, respectively, the fourth sectionhaving attachment receiving means in the form of holes for receivingscrews for attachment of the plate to the door.

A third form of the invention comprises a plate having a pair ofparallel spaced angles, forming a middle section and a pair of parallelend sections, disposed at 90 angles relative to the middle section andextending in opposite directions, forming generally a Z in crosssection. A locking pin projects from the face of one of the endsections, while the other end section and the middle section are adaptedto engage the edge and inside face of the door, respectively, the otherend section having attachment receiving means in the form of holes forreceiving screws for attachment of the plate to the door.

A fourth form of the invention comprises an elongated pin having acoaxial bore to receive a screw for attachment of the pin to the edge ofthe door.

BRIEF DESCRIPTION OF THE DRAWINGS For a clearer understanding of theconstruction and operation of the invention, reference is made to thefollowing detailed description of four preferred embodiments inconjunction with the annexed drawings, in which: I

FIG. 1 is a top plan view of a first embodiment of the invention;

FIG. 2 is an elevation view of said first embodiment attached to be ahinged door with the projecting end of the pin engaging a tubular sleeveinserted in the door jamb;

FIG. 3 is a cross section takenon the line 3-3 of FIG. 2 looking in thedirection of the arrows;

FIG. 4 is a side view of a second embodiment;

,FIG. 5 is an elevation view of the embodiment shown in FIG. 4;

FIG. 6 is a top plan view of the embodiment of FIG.

FIG. 7 is an elevation of a third embodiment;

FIG. 8 is a side view of a fourth embodiment; and

FIG. 9 is an end-view of the embodiment of FIG. 8 as seen on the 9-9 ofFIG. 8, looking in the direction of the arrows.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the annexeddrawings, and particularly to FIGS. 1, 2 and 3 illustrating a firstembodiment of the invention, the security lock is designated in itsentirety by the numeral 10, and comprises a first interlocking member 12adapted for attachment to the inside face of the door adjacent thehinged end, as shown in FIG. 2, and a second interlocking member 14adapted for attachment to the door jamb as shown in FIG. 2.

The first interlocking member 12 comprises an angled support plate 16having a angle 18 formed therein defining a first section 20 and asecond section 22. An elongated pin 24 is attached by welds 26 to theouter edge 28 of the firstsection 20, one end of the pin projecting wellbeyond the end of the plate 16. The second section 22 includesattachment receiving means in the form of a pair of spaced counterboredholes 30 to receive a pair of screws for attaching the firstinterlocking member 12 to the inside face of a door 32 adjacent thehinged end thereof in such a position that the projecting end of the pin24 extends beyond the door as shown in FIG. 2. The door 32 is mounted onhinge means 34 to swing outwardly as indicated by the arrow in FIG. 2,which arrangement disposes the hinge pins on the outside of the door ina position where the pins can easily be removed.

The second interlocking member 14 comprises an elongated tubular sleeve36 adapted to be received within a drilled hole 38 in the door jamb 40in a position to receive the projecting end of the pin 24 when the dooris in its closed position as shown in FIG. 2.

It will be noted, from an inspection of FIG. 2, that the projecting endof the pin 24 is received within the tubular sleeve 36 when the door isclosed, thus preventing the outward swinging of the hinged end of thedoor 32 when the hinge pins of the hinges 34 are removed from theoutside, yet permitting the end of the pin 24 to swing in a circle outof engagement with the sleeve 36 when the door is opened.

A second embodiment of the invention is illustrated in FIGS. 4, and 6,in which the security lock is designated in its entirety by the numeral42 and comprises a first interlocking member 44 and a secondinterlocking member 46. y

The first interlocking member 44 comprises an angled support plate 48,having a first 90 angle 50, a second 90 angle 52 parallel with andspaced from the angle 50, and a third 90 angle 54 disposed at rightangles with the angle 50, the angles forming a first section 56, asecond section 58, a third section .60, and a fourth section 62. Theangles '50 and 54 are contiguous to the first section 56, wherebythesections 58 and 62 join directly with the section 56, and the angle 52is contiguous with the section 58, whereby the sections 58 and 62 aredirectly joined.

As seen in FIG. 5, the section 62 includes attachment receiving means inthe form of a pair of spaced, countersunk, holes 64 to accommodate apair of screws for attachment of the support plate 48 to the hinged endof a door 68, the section 58 being adapted to be received in a rabbetedportion of the face of the door adjacent the hinged end as seen in FIG.4. A pin 66 is secured, at one end, to the face of the section 56, thepin being elongated to project beyond the outer extremity of the section58 and the hinge 70 when attached to the door as described above. Thesection 60, as seen in FIG. 4, is in the form of a truncated righttriangle with the base thereof in contact with the face of the door 68when attached as described. In this position, the section 60 serves as abrace or reinforcing means to prevent the pin carrying section 56 frombending backwards if someone should remove the hinge pins and attempt toforce the hinge end of the door 68 outwardly in the direction indicatedby the arrow in FIG. 4.

The second interlocking member 46 comprises an elongated tubular sleeve72 adapted to be inserted within a hole 74 drilled in the door jamb. 76in a position to receive the projecting end of the pin 66 when the door68 is in its closed position as shown in FIG. 4.

FIG. 7 illustrates a third embodiment of the invention in which thefirst interlocking member 78 comprises an angled support plate 80 havinga pair of spaced, parallel, angles 82 and 84, each angle being 90 withreference to the three sections so formed, that is, a first or endsection 86, a second or a middle section 88, and a third or end section90, the sections 86 and 90 being parallel and extending in oppositedirections from the second section 88, whereby the plate may begenerally termed a Z in cross section. The first or end section 86carries a projecting pin 92, which pin, similar to the projecting pinsin the previously described modifications, projects beyond the outer endof the middle or second section 88 to a position to be received withinan elongated tubular sleeve. The third section 90 is pierced withattachment receiving means in the form of g a pair of spaced countersunkholes 94 adapted to receive screws for attachment of the interlockingmember 78 to the hinged edge of a door 96.

FIGS. 8 and 9 illustrate a fourth embodiment of the invention in whichthe security lock is designated in its entirety by the numeral 98 andcomprises a first interlocking member 100 and a second interlockingmember 102.

The first interlocking member 100 comprises an elongated projecting pin104 having attachment receiving means in the form of a coaxial bore 106adapted to receive an attaching screw 108 for fastening the pin 104 tothe hinged end of an outwardly opening door 110 hinged at,112 forswinging outwardly in the direction indicated by the arrow in FIG. 8.

The second interlocking member 102 comprises an elongated tubular sleeve114 adapted to be received within a drilled hole 116 in the door jamb118, in such a position as to receive the projecting pin 104 when thedoor is in its closed position as shown.

It is evident, from the construction illustrated in FIG. 8, that itisimpossible to open the door from the hinged end when the door is closed,merely by removing the hinge pins.

I claim:

1. A security lock for a hinged door, comprising: a pair of separateinterlocking members for separate attachment to a door and to a doorjamb, respectively, one of said members having a fixed projecting pinand attachment receiving means for attaching said member to the hingedend of a hinged door, and the other member comprising an elongatedtubular sleeve adapted to be received within a hole, in the door jamb toreceive the end of said pin when the door is in its closed position,said one member including an angled support plate having at least twosections, each section disposed at 90 relative to an adjoining section,said pin being attached to one of said sections, and another sectionincluding said attachment receiving means, and a third section extendingat a 90 angle from said pin carrying section and contacting the doorwhen the said one of said interlocking members is secured thereto,whereby said third section serves as a reinforcing section for said pincarrying section, said third section lying in a plane disposed at rightangles to said other sections.

2. A security lock for a hinged door as defined in claim 1, in whichsaid projecting pin is attached to an end of one of said sections remotefrom the angle I therein.

3. A security lock for'a hinged door as defined in claim 1, in which twoof said sections are connected with said pin receiving section, each ofsaid pin receiving sectionand said two sections connected therewithbeing mutually disposed at angles with each other,

and the fourth of said sections being connected with the end of one ofsaid two sections remote from said pin receiving section and disposedparallel with said pin receiving section.

6 ing from the middle section, said pin being attached to the face ofone of said end sections, and the other end section including saidattachment receiving means.

1. A security lock for a hinged door, comprising: a pair of separateinterlocking members for separate attachment to a door and to a doorjamb, respectively, one of said members having a fixed projecting pinand attachment receiving means for attaching said member to the hingedend of a hinged door, and the other member comprising an elongatedtubular sleeve adapted to be received within a hole, in the door jamb toreceive the end of said pin when the door is in its closed position,said one member including an angled support plate having at least twosections, each section disposed at 90* relative to an adjoining section,said pin being attached to one of said sections, and another sectionincluding said attachment receiving means, and a third section extendingat a 90* angle from said pin carrying section and contacting the doorwhen the said one of said interlocking members is secured thereto,whereby said third section serves as a reinforcing section for said pincarrying section, said third section lying in a plane disposed at rightangles to said other sections.
 2. A security lock for a hinged door asdefined in claim 1, in which said projecting pin is attached to an endof one of said sections remote from the angle therein.
 3. A securitylock for a hinged door as defined in claim 1, in which two of saidsections are connected with said pin receiving section, each of said pinreceiving section and said two sections connected therewith beingmutually disposed at 90* angles with each other, and the fourth of saidsections being connected with the end of one of said two sections remotefrom said pin receiving section and disposed parallel with said pinreceiving section.
 4. A security lock for a hinged door as defined inclaim 1, in which said angled support plate includes two parallel anglesforming three sections, one being a middle section and two end sections,the two end sections being parallel with one another and oppositelyextending from the middle section, said pin being attached to the faceof one of said end sections, and the other end section including saidattachment receiving means.